#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long
#define endl "\n"
const ll mod = 1e9 + 7;

void solve() {

}

int main() {
	std::ios::sync_with_stdio(0);
	std::cin.tie(0), std::cout.tie(0);
	/*int t; std::cin >> t;
	while (t--)*/solve();
	return 0;
}